The approach of a typhoon or low atmospheric pressure system can cause the sea level (tide level) to rise significantly.
 This phenomenon is called a storm surge.
 The Storm Surge Risk Search Service is based on the "Maps of Storm Surge Inundation Risk Areas" prepared by the Tokyo Metropolitan Government, and allows you to easily search for the inundation area caused by the large-scale storm surge event scenario using maps and addresses.
 You can search for " Inundation depth" (Maximum inundation depth expected in the event of inundation) and "inundation duration" (Maximum inundation duration expected in the event of inundation).

 Storm surge indicate the areas storm surge (along the Tokyo Bay coastline within the Tokyo metropolitan area) that are expected to be inundated, as well as the anticipated depth and duration of flooding, should storm surge conceivable storm surge cause flooding from the coast or rivers.
 Based on storm surge, each ward will create storm surge maps and other materials to inform residents. These efforts are intended to ensure the safety of residents, including facilitating their evacuation.

 For more information on "Maps of Storm Surge Inundation Risk Areas", please refer to the website of the Tokyo Metropolitan Government Bureau of Port and Harbor.